[Event "Sparkassen-Open A"] [Site "Heusenstamm, Martinsee"] [Date "2025.11.21"] [Round "3.42"] [White "Müller, Mark"] [Black "Derr, Oleg"] [Result "0-1"] [ECO "A00"] [WhiteElo "1995"] [BlackElo "2140"] [PlyCount "42"] [EventDate "2025.11.20"] [WhiteTeam "SC Königsflügel Lindenholzhausen"] [BlackTeam "VSG 1880 Offenbach"] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 Be6 8. Be2 Nf6 9. Bg5 Be7 10. Bxf6 Bxf6 11. Nc4 Nd4 12. Ne3 Rc8 13. O-O O-O 14. Qd3 Bg5 15. Ncd1 b5 16. c3 Bc4 17. Qxc4 bxc4 18. cxd4 exd4 19. Nxc4 d5 20. exd5 d3 21. Bxd3 Qxd5 0-1